Floribunda rose plant named `KORdrekes`

ABSTRACT

Floribunda rose plant having orange flower color; high flower production; excellent vase life; good shipping qualities; and very vigorous growth habit.

The present invention relates to a new and distinct variety of rose plant of the floribunda class which was discovered as a single branch spontaneous flower color mutation on a rose plant of the variety `KORmiller` (U.S. Plant Patent Application Ser. No. 08/985,371, filed Dec. 4, 1997) growing in a greenhouse in Honselersdijk, Holland, which bore an orange flower as compared to the pastel pink flowers of `KORmiller`.

`KORdrekes` differs from its parent, `KORmiller`, principally in flower color. It has the same growth, production (26 to 29 flowers per year in a greenhouse), vase life, good shipping qualities and response to the environment as `KORmiller`.

Asexual reproduction of this new variety by budding, as performed at Boskoop, Holland, and Somis, Calif. shows that the foregoing and all other characteristics and distinctions come true to form and are established and transmitted through succeeding propagations.

The accompanying illustration shows typical specimens of the vegetative growth and flowers of this new variety in different stages of development, depicted in color as nearly true as it is reasonably possible to make the same in a color illustration of this character.

The following is a detailed description of my new rose cultivar with color descriptions using terminology in accordance with The Royal Horticultural Society (London) Colour Chart, except where ordinary dictionary significance of color is indicated.

Parentage: Spontaneous mutant of `KORmiller` (U.S. Plant Patent Application Ser. No. 08/985,371, filed Dec. 4, 1997.)

Classification:

Botanical.--Rosa hybrida.

Commercial.--Floribunda.

FLOWER

Observations made from specimens grown in a greenhouse environment at Boskoop, Holland, and Somis, Calif. from January 1997 to June 1998.

Blooming habit: Continuous.

Bud:

Size.--About 11/2 inches long when the petals start to unfurl.

Form.--Pointed ovoid with a somewhat blunt tip.

Color.--When sepals first divide, bud color is Orange Group 29D. When half blown, the upper sides of the petals are Orange Group 29C on the outer two-thirds of the petal with Orange Group 25D on the inner one-third, and the lower sides of the petals are Orange Group 29D.

Sepals.--Color: Green Group 138B. Surface texture: Covered in fine hairs. There are three normally appendaged sepals. There are two unappendaged sepals with hairy edges.

Receptacles.--Color: Yellow-Green Group 146C. Shape: Funnel. Size: Medium (about 5/16 inch×1/4 inch.) Surface: Smooth.

Peduncle.--Length: Short, averaging about 21/2 inches. Surface: Smooth. Color: Yellow-Green Group 146C. Strength: Stiff, erect.

Bloom:

Size.--Medium. Average open diameter is about 31/2 to 4 inches.

Borne.--Singly.

Stems.--Strong, averaging about 18-22 inches in length.

Form.--When first open: High centered. Permanence: Retains its form to the end, outer petals curl back, quill fashion.

Petalage.--Number of petals under normal conditions: 25 to 30.

Color.--The upper sides of the petals are Orange Group 29C on the outer two-thirds of the petal with Orange Group 25D on the inner one-third. The reverse sides of the petals are Orange Group 29D. The base of the petals has a bright Yellow Group 7C half-moon about 3/8 inch×3/8 inch at the point of attachment. The major color on the upper sides is Orange Group 29C.

Variegations.--Occasional greenish-white streaks on the guard petals.

Discoloration.--At the end of the first day: No change. At the end of the third day: No change. By day 10-12 in the vase, the entire upper petal surface changes to Orange Group 29C.

Fragrance.--Slight.

Petals:

Texture.--Thick, leathery.

Shape.--Round.

Form.--Tips slightly recurved, edges slightly quilled.

Arrangement.--Imbricated. Petaloids in the center are few, small.

Persistence.--Petals drop off cleanly before drying.

Lastingness.--On the plant: Long (9 to 10 days). As a cut flower: Very long (16 to 18 days).

Reproductive parts:

Anthers.--Size: Medium. Quantity: Many. Color: Yellow-Orange Group 15A. Arrangement: Regular around styles.

Filaments.--Color: Yellow Group 13A.

Pollen.--Color: Gold yellow.

Styles.--Color: Greyed-Purple Group 187C.

Stigmas.--Color: Greenish-white.

Plant:

Form.--Bush.

Growth.--Very vigorous; upright; branching. Mature plant, six to seven months after planting, is 5 to 51/2 feet in height and 31/2 feet in width. Plants are kept at this height and width by flower harvesting.

Foliage: Number of leaflets on normal mid-stem leaves: Five.

Size.--Large (61/2 inches long×43/4 inches wide).

Quantity.--Abundant.

Color.--New foliage: Upper side and lower sides: Greyed-Purple Group 184B. Old foliage: Upper side: Green Group 139A. Lower side: Green Group 137C. The foliage upper surface will rapidly turn green, while the lower surface will keep the Greyed-Purple Group 184B for several days before becoming green.

Leaflets:

Shape.--Pointed oval.

Texture.--Leathery surface: Matte.

Edge.--Serrated.

Serration.--Single, small.

Petiole rachis.--Color: Greyed-Purple Group 187B.

Petiole underside.--Smooth.

Stipules.--Medium (5/8"), serrated, bearded.

Disease resistance.--Resistant to mildew under normal growing conditions in a greenhouse. Not tested for resistance to blackspot and rust.

Wood:

New wood.--Color: Greyed-Purple Group 187B. Bark: Smooth.

Old wood.--Color: Green Group 139A. Bark: Smooth.

Prickles:

Quantity.--On main canes from base: Few. On laterals from main canes: Few.

Form.--Short, hooked slightly downward.

Color when young.--Greyed-Purple Group 187B.

Color when mature.--Greyed-Orange Group 174D.

Small prickles:

Quantity.--On Main stalks: None. On laterals: None. 

We claim:
 1. A new and distinct variety of rose plant of the floribunda class, as herein shown and described, characterized particularly by its orange flower color; high flower production; excellent vase life; good shipping qualities; and very vigorous growth habit. 